Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
Using molecular-beam epitaxy, we grew a MnAs/GaAs multilayer on a GaAs(100) substrate and compared its magneto-transport characteristics to those of a single-layer MnAs thin film. The crystal orientation of the MnAs layers in both samples was type-B. M–H measurements revealed two-fold symmetric magnetic anisotropy on the surface with the easy and hard direction of magnetization. When the current flowed along the hard direction, the MnAs/GaAs multilayer exhibited negative magnetoresistance below Curie temperature; when the current flowed along the easy direction, it turned positive. We suggest that this peculiar anisotropic magneto-transport behavior in the multilayer originated from two-dimensional carrier confinement and spin-orbit coupling.
- OSTI ID:
- 22409989
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 117; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COMPARATIVE EVALUATIONS
CRYSTALS
CURIE POINT
GALLIUM ARSENIDES
HETEROJUNCTIONS
L-S COUPLING
LAYERS
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE ARSENIDES
MOLECULAR BEAM EPITAXY
SUBSTRATES
SURFACES
THIN FILMS
TWO-DIMENSIONAL SYSTEMS